Acting

—

as Self

2020

as Voice of KITT (voice)

2014

(5 episodes) as George Feeny

2010

as K.I.T.T. (voice)

2007

as Commissioner Ebbers

2005		The Closer (2 episodes) as Commissioner Andrew Schmidt
2005		Grey's Anatomy (5 episodes) as Craig Thomas

2004

(1 episode) as Judge Milton Brody

2003

(1 episode)

2002		Kim Possible (1 episode) as Robot Pilot (voice)
2002		NBC 75th Anniversary Special as Self

2001

(1 episode) as Dr. Douglas

1998

(1 episode) as Phillip Waldscott

1996

as Reverend Hutchinson

1995

(1 episode) as George Feeny

1994		Magic Kid II as Manny
1994		The American Revolution (6 episodes) as John Adams
1994		Touched by an Angel (1 episode) as George (1 episode) as Whit Russell

1993

(158 episodes) as George Feeny

1992

as Judge Julius Burns

1991

as Detective Lieutenant Fine

1990

as John Nicks

1989		The Simpsons (2 episodes) as KITT (voice)
1989		Making a Case for Murder as Slaney
1989		Her Alibi as Sam

1987		The Little Match Girl as Haywood Dutton
1987		Blind Date as Judge Harold Bedford

1985		Knight Rider: Halloween Knight as K.I.T.T. (voice)
1985		Night of 100 Stars II as Self

1984

as K.I.T.T. (voice)

1982		St. Elsewhere (137 episodes) as Mark Craig
1982		Knight Rider (84 episodes) as K.I.T.T. (voice)
1982		Knight Rider: Knight of the Phoenix as K.I.T.T. (voice)
1982		Drop-Out Father as Draper Wright
1982		Faerie Tale Theatre (1 episode) as Narrator (voice)
1982		Rooster as Dr. DeVega
1982		Rehearsal for Murder as Walter Lamb

1981		Reds as Julius Gerber
1981		Conquest of the Earth as Norman
1981		The Million Dollar Face as Henry Burns
1981		All Night Long as Richard H. Copleston

1980		Freebie and the Bean (9 episodes)
1980		Damien: The Leper Priest as Bishop Koeckemann
1980		The Blue Lagoon as Arthur Lestrange
1980		City in Fear as Freeman Stribling
1980		Galactica 1980 (2 episodes) as Norman Blore

1979		Trapper John, M.D. (1 episode)
1979		Hart to Hart (1 episode)
1979		Sunburn as Crawford
1979		Blind Ambition (4 episodes) as G. Gordon Liddy
1979		The Rebels as John Adams

1978		Diff'rent Strokes (1 episode)
1978		Grandpa Goes to Washington (1 episode)
1978		Sergeant Matlovich vs. the U.S. Air Force as Father Veller
1978		Big Bob Johnson and His Fantastic Speed Circus as Lawrence Stepwell III
1978		The Bastard as Samuel Adams
1978		The One and Only as Mr. Crawford

1977		The Court-Martial of George Armstrong Custer as Major Marcus Reno
1977		The Return of the Incredible Hulk as Dr. John Bonifant
1977		The Incredible Hulk (1 episode) as Dr. John Bonifant
1977		Killer on Board as Marshall Snowden
1977		Oh, God! as George Summers
1977		Soap (1 episode) as Heinrich Himmel
1977		Black Sunday as Pugh

1976		Quincy, M.E. (3 episodes)
1976		The Nancy Walker Show (12 episodes) as Kenneth Kitteridge
1976		Francis Gary Powers: The True Story of the U-2 Spy Incident as Bissell
1976		The Adams Chronicles (13 episodes)

1975		Barbary Coast (1 episode) as Harry Boyle
1975		One of Our Own as Dr. Moresby
1975		Sarah T. - Portrait of a Teenage Alcoholic as Matt Hodges

1974		Kolchak: The Night Stalker (1 episode) as Police Lt. Jack Matteo
1974		The Rockford Files (1 episode) as Gary Bevins (1 episode) as Thomas Caine
1974		The Parallax View as Austin Tucker
1974		A Case of Rape as Leonard Alexander

1973		The Lie as Albert
1973		Toma (2 episodes)
1973		Murdock's Gang as Roger Bates

1972

as John Adams

1971		McMillan and Wife (1 episode) as Commander Campbell
1971		Cannon (1 episode)

1970

(2 episodes)

1969

as Mr. Cromwell

1968		The Good Guys (1 episode)
1968		The Mod Squad (1 episode)

1967		The President's Analyst as Wynn Quantrill
1967		The Graduate as Mr. Braddock
1967		Judd for the Defense (1 episode)
1967		Two for the Road as Howard Manchester
1967		Ironside (1 episode)
1967		Captain Nice (15 episodes) as Carter Nash

1966

(1 episode) as Tony Webb

1965

as Albert Amundsen

1963

as Mr. Calkins

1961

(1 episode) as Mike Herman (1 episode) as Malloy

1958

(1 episode) as Harry Culverin

1956

(1 episode) as Self - Performer

1951

(1 episode) (1 episode) as John Quincy Adams